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Since 1940, 4 pitchers are tied for winning the most games by a rookie, with 21 wins. The first three are Larry Jansen in 1947, Dave Ferriss in 1945 and Bill Voiselle in 1944.

most wins by a rookie pitcher since 1940
Interpreted as:
most regular-season wins by a rookie pitcher since 1940
1947Jansen1945Ferriss1944Voiselle1942Beazley1985Browning1954Grim1953Haddix1949Kellner1948Bearden1976Fidrych1968Koosman1964Bunker1963Peters1957Sanford1941Newsome1941Riddle2012Lynn1970Morton1960Estrada1945Burkhart2006Verlander2001Sabathia21212121202020202019191919191919181818181717
NAMEWSEASONTMLW%GGSERASOCGSHOSVIPHERRHRBBHBPGFIBBTBFWPK/9BB/9K/BBHR/9K%BB%WHIPBABIPRAERA-FIPFIP-H/9PRAA
Larry JansenLarry Jansen211947
NYGNYG
5.80842303.161042011248.02418710222571598523.772.071.820.8010.65.81.20.2733.70773.51878.7514.4
Dave FerrissDave Ferriss211945
BSABSA
10.67735312.96942652264.226387101685741,10343.202.891.110.208.57.71.31.2823.43853.17898.9412
Bill VoiselleBill Voiselle211944
NYGNYG
16.56843413.021612510312.227610513831118411,32774.633.401.360.8912.18.91.26.2423.97823.971077.94-9
Johnny BeazleyJohnny Beazley211942
SLNSLN
6.77843232.13911333215.1181516747331589073.803.051.250.1710.28.21.18.2462.80632.87827.5715.3
Tom BrowningTom Browning201985
CINCIN
9.69038383.55155640261.124210311129733081,08325.342.512.121.0014.36.71.21.2593.82953.811028.33-1.9
Bob GrimBob Grim201954
NYYNYY
6.76937203.26108811199.017572789853882544.883.841.270.4113.110.31.31.2683.53923.23917.917.1
Harvey HaddixHarvey Haddix201953
SLNSLN
9.69036333.061631961253.022086972469421,03195.802.452.360.8515.86.71.14.2543.45713.40797.8325.1
Alex KellnerAlex Kellner201949
PHAPHA
12.62538273.75941901245.024310212018129291,06973.454.740.730.668.812.11.52.2724.41894.301028.93-2.3
Gene BeardenGene Bearden201948
CLECLE
7.74137292.43801561229.2187627291063493553.134.150.750.358.611.31.28.2422.82603.90997.330.4
Mark FidrychMark Fidrych191976
DETDET
9.67931292.34972440250.12176576125332399663.491.911.830.439.75.31.08.2472.73633.15867.8013.7
Jerry KoosmanJerry Koosman191968
NYMNYM
12.61335342.081781770263.2221617216698071,05886.082.362.580.5516.86.51.10.2602.46702.70967.543.7
Wally BunkerWally Bunker191964
BALBAL
5.79229292.69961210214.01616472176230585034.042.611.550.7111.37.31.04.2143.03773.651006.77-0.2
Gary PetersGary Peters191963
CWSCWS
8.70441302.331891341243.0192636996884297857.002.522.780.3319.37.01.07.2602.56672.34677.1132.1
Jack SanfordJack Sanford191957
PHIPHI
8.70433333.081881530236.219481942294302989127.153.572.000.8419.09.51.22.2523.57803.31877.3812.6
Dick NewsomeDick Newsome191941
BSABSA
10.65536294.13581720213.22359811513797494462.443.330.730.556.18.41.47.2824.84974.12999.901.6
Elmer RiddleElmer Riddle191941
CINCIN
4.82633222.24801541216.218054688595488423.322.451.360.339.06.71.10.2352.82623.29897.489.6
Lance LynnLance Lynn182012
STLSTL
7.72035293.78180000176.016874761664102374439.203.272.810.8224.28.61.32.3213.89983.48908.597.4
Carl MortonCarl Morton181970
MONMON
11.62143373.601541040284.22811141232712541171,21824.873.951.230.8512.610.31.43.2803.89874.141068.88-6.8
Chuck EstradaChuck Estrada181960
BALBAL
11.62136253.581441212208.2162838718101156388326.214.361.430.7816.311.41.26.2383.75973.941046.99-4
Ken BurkhartKen Burkhart181945
SLNSLN
8.69242222.90671243217.1206707696631290132.772.731.020.377.47.31.25.2613.15763.41928.536.9
Justin VerlanderJustin Verlander172006
DETDET
9.65430303.63124110186.01877578216060177656.002.902.071.0216.07.71.33.2943.77804.34969.053.6
CC SabathiaCC Sabathia172001
CLECLE
5.77333334.39171000180.11498893199570176378.534.741.800.9522.412.51.35.2764.64984.21947.445.2
Freddy GarciaFreddy Garcia171999
SEASEA
8.68033334.07170210201.1205919618901004888127.604.021.890.8019.110.11.47.3124.29874.09879.1613.7
Dave FlemingDave Fleming171992
SEASEA
10.63033333.39112740228.12258695136040394684.412.361.870.5111.86.31.25.2803.74863.38868.8714.2
Tom GordonTom Gordon171989
KCRKCR
9.65449163.64153111163.0122666710861164677128.454.751.780.5522.612.71.28.2623.70943.28896.747.3
Dwight GoodenDwight Gooden
Mark LangstonMark Langston
Rick SutcliffeRick Sutcliffe
Stan BahnsenStan Bahnsen
Don NewcombeDon Newcombe
Ted WilksTed Wilks
Ernie WhiteErnie White
Sid HudsonSid Hudson
Dakota HudsonDakota Hudson
Ryan YarbroughRyan Yarbrough
Kenta MaedaKenta Maeda
Matt ShoemakerMatt Shoemaker
Yu DarvishYu Darvish
Wade MileyWade Miley
Ivan NovaIvan Nova
Jason JenningsJason Jennings
Mike BoddickerMike Boddicker
Ron GuidryRon Guidry
Jim HughesJim Hughes
Steve BusbySteve Busby
Dick HughesDick Hughes
Tom SeaverTom Seaver
Herb ScoreHerb Score
Luis GilLuis Gil
Shota ImanagaShota Imanaga

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